1 /* libs/cutils/socket_loopback_server.c
2 **
3 ** Copyright 2006, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 #include <cutils/sockets.h>
19
20 #include <stdlib.h>
21 #include <string.h>
22 #include <unistd.h>
23 #include <errno.h>
24 #include <stddef.h>
25
26 #define LISTEN_BACKLOG 4
27
28 #ifndef HAVE_WINSOCK
29 #include <sys/socket.h>
30 #include <sys/select.h>
31 #include <sys/types.h>
32 #include <netinet/in.h>
33 #endif
34
35 /* open listen() port on loopback interface */
socket_loopback_server(int port,int type)36 int socket_loopback_server(int port, int type)
37 {
38 struct sockaddr_in addr;
39 size_t alen;
40 int s, n;
41
42 memset(&addr, 0, sizeof(addr));
43 addr.sin_family = AF_INET;
44 addr.sin_port = htons(port);
45 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
46
47 s = socket(AF_INET, type, 0);
48 if(s < 0) return -1;
49
50 n = 1;
51 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n));
52
53 if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
54 close(s);
55 return -1;
56 }
57
58 if (type == SOCK_STREAM) {
59 int ret;
60
61 ret = listen(s, LISTEN_BACKLOG);
62
63 if (ret < 0) {
64 close(s);
65 return -1;
66 }
67 }
68
69 return s;
70 }
71
72